NWPX Infrastructure Publishes Verified Environmental Product Declaration for Water Transmission System Pipe

Supports resiliency and state required reporting transparency into environmental impacts of manufacturing the Company's water transmission systems.

VANCOUVER, Wash., Oct. 15, 2025 /PRNewswire/ -- NWPX Infrastructure, Inc. (Nasdaq: NWPX), a leading manufacturer of water-related infrastructure products, today announced the publication of its first third-party verified Environmental Product Declaration (EPD) covering its cement-mortar-lined welded steel pipe.

Produced under the Northwest Pipe Company brand, the cement-mortar-lined spiralwelded steel pipe is produced in accordance to AWWA Manual M11 at facilities holding an International Organization for Standardization (ISO) Multisite ISO 9001:2015 Certification.

Developed in accordance with international standards and independently reviewed, the EPD provides transparent data on the lifecycle environmental impacts of the Company's water transmission systems. By quantifying embodied carbon and other key indicators, the EPD equips engineers, contractors, and municipalities with credible information to support sustainable procurement, meet Buy Clean California requirements, and comply with evolving state and federal environmental reporting standards.

The Company intends to differentiate its marketing of water transmission systems by integrating the EPD into the commercial bidding process for customers and project owners, usually municipalities, responsible for navigating environmental criteria within their broader infrastructure planning.

"Our Company has a growing commitment to sustainability and corporate responsibility," states Scott Montross, President and CEO of NWPX Infrastructure. "For decades, our water transmission systems have delivered essential water to communities across North America. Now we are able to provide additional transparency into the environmental impacts of these critical infrastructure products."

About NWPX Infrastructure – Founded in 1966, NWPX Infrastructure, Inc. is a leading manufacturer of water-related infrastructure products. Under the Northwest Pipe Company brand, the Company is the largest manufacturer of engineered water transmission systems in North America and produces steel casing pipe, bar-wrapped concrete cylinder pipe, and pipeline system joints and fittings. The Company also provides solution-based products for a wide range of markets including high-quality reinforced precast concrete products and lined precast sanitary sewer system components, which are manufactured under the NWPX Geneva brand, as well as water distribution and management equipment including pump lift stations, wastewater pretreatment, and stormwater quality products through the NWPX Park brand. Strategically positioned to meet growing water and wastewater infrastructure needs, the Company's skilled team is committed to quality and innovation while upholding its core values of accountability, commitment, and teamwork. Headquartered in Vancouver, Washington, NWPX Infrastructure operates 13 manufacturing facilities across North America. For more information, please visit www.nwpx.com.

Contact:
Aaron Wilkins
Chief Financial Officer
NWPX Infrastructure, Inc.
360-397-6294 • awilkins@nwpx.com

View original content to download multimedia:https://www.prnewswire.com/news-releases/nwpx-infrastructure-publishes-verified-environmental-product-declaration-for-water-transmission-system-pipe-302585354.html

SOURCE NWPX Infrastructure, Inc.